Automatic polishing and lacquering machine.



I. F. GAII..

AUTOMATIC POLISHING AND LACQUERING MACHINE.

APPHCATION FILED OCT 20, I9I5.

Patented QIIIIIy 2, 1918.

I2 SHEETS-SHEET I.

mwN

IINWIAHIWAIMIWM! J. F. GAIL.

AUTOMATIC POLISHING AND LACQUERING MACHINE.

APPLICATION FILED OCTA 20, |915- IPaftented July 2, 1918.

I2 SHEETS-SHEET 2A y y@ n I. F. GAIL.

AUTOMATIC POLISHING AND LACQUERING MACHINE.

8 w fm M QM @W Jm J dH m@ nb LIL d Dl APPLICATION FILED OCT. 20, 1915.

I. F. GAIL.

AUTOMATIC PoLnsHlNG AND LAGQUERING MACHINE.

Patented July 2,1918.

I2 SHEETS-SHEET 4I APPLICATION FILED OCT. ZCII ISIS.

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I. F. GAII..

AUTOMATIC POLISHING AND LACQUERING MACHINE.

APPLICATION FILED OCT. 20, 1915.

' Patented July 2,1918.

J. F. GAH..

AUTOMATIC POLISHING AND"LACQUER|NG MACHINE. APPLICATION FILED ocT. 20,1915.

1L Y? Mm., Patented July 2, 1918.

12 SHEETS-SHEET 6- I. F. GAII..

AUTOMATIC POLISHING ANDLACQUERING MACHINE.

APPLICATION FILED OCT. 20, I9I5.

' Patentedluly 2,1918..

l2 SHEETS-SHEET 7.

J. F. GAIL. AUTOMATIC POLISHING AND LACQUERING MACHINE.

APPLICATION FILED OCT. 20, |915. I I .W I 9m?. Patented July 2,1918.

I2 SHEETS-SHEET 8- www. ----:Imw

J. F. GAIL. AUTOMATIC PoLAsHAN'G AND LACQUERANG MACHINE.

APPLICATION FILED OCT. 20. l9l5. y lPaftented July 2,1918.

IZ SHEETS-SHEET 9.

AAA lAw AA A l AA A f A AAAAAAA A A LA I. F. GAIL. AUTOMATIC POLISHINGAND LACQUERING MACHINE.

APPLICATION FILED,0CT. 20, |915.

Patented. July 2, 1918.

I2 SHEETS-SHEET 10- I. F. GAII..

AUTOMATIC POLISHING AND LACQUERING MACHINE.

APPLICATION FILED OCT. 20. |915. I Patented July 2,1918.

I2 SHEETS-SHEET Il.

J. F. GAII..

AUTOMATIC POLISHING AND LACQUERING MACHINE. APPLICATION FILED0cT.2o.1915.

mgl; Y@ Patented July 2, 1918.

i2 SHEETS-SHEET 12.

als

. A JUHN 1F. HAIL, 0F KENCSHA, WFSCONSINEASSIGNOR T0 THE SIMMONSMANUFACTURING COMPANY, OlF KENOSHA. WISCONSIN. A CORPORATION 0FWISCONSIN.

AUTOMATIC POLISJEIING AND LACQUERING MACHINE.

Application tiled October 20, 1915.

,To all whom, it may concern.

Be iti-.known that 1, JOHN F. GAIL, a citizen of the' United States,residing in the city of Kenosha., county of Kenosha, and State ofWisconsin, have invented certain new and useful Improvements inAutomatic Polishing and Lacquering Machines, of which the following is aspecification.

My invention relates to improvements 1n polishing and lacqueringmachines, and more particularly relates to a machine which 1s designedto operate upon a successlon ot similar articles which areautomaticallypolished and coated Without attention from the Ioperator.

Among the salient objects of the invention are, to provide a machine invvhich the objects are in turn polished, receive an application ofcoating material, and are then art-iicial'ly dried to set the coatbefore the objects leave the machine; to provide a machlne of the classdescribed in which the objects are successively carried into the tieldof the polishing devices, from thence into the field of the coatingmechanism, and Athence into a heated zone before finally being ejectedfrom t-he machine when dry; to provide a coating machine in which theadherent coat is applied to a succession of objects,` the coated objectsbeing then carried into a heated zone and nally cooled artificiallybefore ejection from the machine; to provide a machine of the classvdescribed in which objects are mounted in succession upon a travelingconveyer which transfers the objects in turn into the fields ofthevarious instrumentalities; to provide a machine of the class describedin which arrangements are 'made to l prevent the coating material fromgaining access to the -operating parts of the mechanism; to provide amachine of the class described in which the object-holding devices areso organized that While the coat is being applied to the objects, thelatter are placed in such relation to their supports that the coatingmaterial is prevented from reaching the-latter; to provide a machine ofthe class described which is arranged to operate Specification ofLetters Patent.

upon objectsv having an irregular contourV and so organized that thepolishing devices engage all portions of the surface of the object, andthe coating devices apply coating material evenly to the surface of thepolished object; to provide a machine Which is adaptable for operatingupon objects of varying nozzle and associated parts;

Patented duty 2, igt.

Serial No. 56.973.

Figure 1 is a. front elevation of a machine f embodying the principlesof my invention; F 1g. 2 is a rear elevatlonof the machine in Fig. 1;

Fig. 3 is an end elevation of Fig. 1, looking .from the right hand sideof the figure; Flg. 4 1s a plan view of the right hand end of Fig. 1;

Fig. 4a is an end view of the shifter pin restoring mechanism;

Fig. 5 is a fragmentary section taken on the line 5 5 of Fig. 4;

F ig. 5a is an end ViewY of the brake mec-haism for arresting therotation of the spines; Fig. 6 is an enlarged section taken on lthelinel 6-6 of Fig. 1;

Fig. 7 is an enlarged section taken on the line 7-7 of Fig. 1; f i

Fig. 8 is an enlarged elevation of certain parts of the lacquer-applyingmechanism;

Fig. 9 is a pian view of Fig. 8; C

Fig. 10 is a. longitudinal section of wone of j' the .spindles Fig. 11is a section taken on the line 11-11 i of Fig. 10; v

, Fig. 411a is a perspective vievv of one of the chuck members;

Fig. 12 is an elevation of the idler spider for the polishing belt;

Fig. 13 is a section taken 'on the line 13-13 of Fig.. 12;

l Figs. 14, 15, 16, 17 and 18 are details of parts of the operatingvalve for the lacquerapplyingv mechanism Fig. .19is an elevation of thelacquering adj ustabie Fig. 20 isa side elevation of Fig. 19.;

Fig. 21 a section taken on the line 21-21 of Fig. '19; and

Fig. 22 is a section taken on the line 22-22 of Fig. 420.

lio

a machine which is designed to automati` In the drawings I haveillustrated as an example of the application of my invention,

cally polish and lacquer small brass mounts which arey used for trimmingmetal bedsteads, although it should be understood that the principles ofmy invention may be employed in the construction of machines adapted tooperate upon widely varying types and sizes of work.

This machine involves the use of a continuously traveling conveyer whichcarries a series of spaced apart spindles to which the objects areapplied, means being rovided to rotate the spindles while the objectsare traveling through the field of the polishing devices. When theobjects have been polished, they pass from out of the field oftheLavaca? I bolt a Cfshaped laterally projecting bracket member 49,somewhat similar to -the member 45;' this member 49 being provided atits which is associated the motor 34, and extends polishing devices andinto the field of thev lacquer-applying mechanism which is automaticallyplcked up and carriedalong by' the conveyer fora limited distance whilethe lacquer is being applied, after which it is released and flies backto its normal position ready to apply the lacquer tothe next succeedingobject. Thisarrangement is preferable on account of the fact that inthis instance the conveyer-travels at a comparatively high linear speedand there would not be time enough to apply lacquer properly to allparts of the surface of the objects if the lacquering nozzleremainedstationary as the objects traveled ast. Afterthe objects havebeen coated with lacquer they travel along with the conveyer 'r`nto` aheated zone which dries the coating, after which they enter a cool zone,and are finally automatically disengaged from the conveyer.

In this machine the framey is supported upon a base member to the endsof which are lbolted kcast iron standards 31 and 32.-

Referring to Fig. 3, it will be noticed that 'on the rear of thestandard 31 there is cast an forms a base for the electric motor 34which drives the machine. The shaft 35'of this motor is extended throughbearings 36 and 37 formed in the standard 31, and is fur'- 39 aroundwhich pass belts 40 and 41. The belt 41 drives the main shaft 42 of theconveyer mechanism through a set of double reduction worm-gearingdesignated as a whole 43. The :outboard bearing 44 for the shaft 42 maybe seen most clearly in Figs. 4 and 6 and is formed in the end of a C-shaped arm 45 (see Fig. 4) bolted upon the head ofthe supporting column31. Securely integral bracket 33, the upper side of which `nished with apair of driving pulleys 38 and A to the other end of the machine whereit passes around the idler sprocket members 52 and 53, these latterrevolving freely on their shaft 51 in the bearing 50.

Describing the conveyer, this is illustrated most clearly'in Figs. 4 and6. rlhe links of the conveyer chain are represented by cast steelmembers 54, one side of each of which 1s formed with pairs of integral,spaced apart, laterally projecting arms 55, the ends o said arms beingformed in U-shape to accommodate the headed ends of corresponding arms56 formed integrally in the opposing sides of the next adjacent members54. rihese members 54 are rotatably hinged together by means oflaterally extending pins 57 which pass through bearing holes in the endsof the arms 55 and 56. The Varms 55 and 56 are spaced apart laterally asufficient distance to accommodate trolley wheels 58 which are adaptedto rotate freely upon the 'hinge pins 57, these trolley wheels 58 beingstandards 31 and 32 at each end of the machine. The track wheels 58 andthe tracks 5,9 and 60 are for the purpose of preventing sag oftheconveyer, due to the relatively -great weight.

Each of the link members 54 of the conveyer chain constitutes abearing'head for one of the object spindles, which latter is shown inlongitudinal section in Fig. 10. Referring to the last named figure, itwill be noticed that the member 54 is formed hollow, the aperture beinglarge enough to provide plenty of clearance space for the hollow shaft63. This latter rotates upon two pairs of ball bearings 64 and 65.applied to the ends of the member 54. These bearings 64 and 65 eachconsists of a set of balls 66, an outer cone 67 screwed into the hollowenlarged end of the member 54, and an inner adjacent inner cone 68, linterpose a spacing sleeve 72, and in order to prevent dust fromentering the ball bearing l tit ovei the enlarged end of the member 54 apressed metal f cap 73 which is suitably conformed to furnish a seat forthe triangular-shaped felt ring 74 which bears against the inner side ofthe pulley 69.l The other end of the'member 54 is equipped with asomewhat similar dust lo cap 75 and felt dust ring 76 which bearsagainst a hollow cone-shaped member 77 keyed or pinned to the end ot'the shaft 63. Between the cone-shaped member 77 and the adjacent innerbearing cone 68 there is in inserted a spacing sleeve 78 somewhat 51m1-lar to the spacingsleeve 72 at the other end of the spindle. Thecone-shaped member 77, which simply constitutes a guard or shield toprevent the ingress of dirt or lacquer into 2o the end of the bearing,is formed with a projecting nose 79 upon which is threaded a collar 80formed with an inwardly projectlng portion 81, between which and the endof the nose 79 there is clamped the hollow chuck member 82, shown moreclearly in Fig. 113. This chuck member 82 is made from a piece ofresilient sheet metal shaped into the f orm of a slightly tapered tube,which is split so as to furnish the desired resiliency and having formedat its inner larger end a plurality of ears 83 which are clamped betweenthe nose 79 and the inwardly projecting portion 81 of the threadedcollar 80. The diameter and degree of taper of the pro' as jectingresilient end of the chuck member 82 are such that the object 84, inthis case a hollow open ended spherical bedstead mount, shown in vdottedlines in Fig. 10, may be forcibly pushed onto the chuck and itsresiliency will then hold the mount 1n position while being polished. Tnorder to effeet certain results which will hereinafter appear, thespindle shaft 63 bored out to accommodate a longitudinal shifter pin 85,the front end of which is reduced inl diameter and tapered, as shown at86, so that it will enter and engage the small hole in the outer end ofthe mount 84, as shown in Fig. l0. While the shifter rod 85 is engaged50 with the mount 84 in this manner, the latter is thus pushed oil'l thechuck member 82 and j removed therefrom a considerable distance axially,as shown in full line positions. This occurs after the mount has beenpolt5 ished and when it no longer needs a particularly rigid support,and is for the purpose of preventing access of lacquer to the chuck orbearing of the spindle. llt should be observed that during the time thatthe mount 84 is engaged with the chuck in its dotted line or polishingposition, the shifter pm is withdrawn inwardly, as will hereinafterappear. f

Describing the polishing means and reat erring to Figs, l and 3, it willbe observed that ll employ a polishing band or belt 87 consisting ot' alarge number of individual abrasive strings hunched together and re-Siliently maintained in the path of the trave cling objects as thelatter travel ywith the 70 eonveyer. A somewhat similar arrangement isdescribed in my co-pending application Serial No. 846,471, liled June22, 1914. lln this case the ends of the bunch of abrasive strings areanchored to a lever bracket piece w 88 and an upper adjustable bracketmember 89, both secured to fixed portions of the trame of the machine.The proper degree of resiliency is obtained by means of a helical spring90 inserted between the upper end of the abrasive belt and the bracketsupport 89. As shown in Fig. 3, the abrasive e member is located in theproper vertical plane to engage the mounts supported upon the chucks 82as -they-travel with the cona5 tinuously moving eonveyer. Tn order 'tomaintain the bunch of strings in their proper relation so as to operateupon themounts to the best advantage, l provide a series of confiningidler pulleys 91 which are rotatim ably supported upon a series of pins92 secured in a series of radially projecting supporting members 93situated at properly spaced intervals around the spider design ated asawhole 94. This spider member 94 aa takes the form of a narrow facedcylindrical casting which is secured to the outside of the dishedsprocket wheel 47 (see lF ig. 6) by a series of screws 95. Thus theidler pulleys 92 are caused to rotate with the sprockets and theeonveyer, and they are so spaced around the periphery of the member 94that UNII they are located between the mounts at the proper radial.distance to support the bunch of stringsin proper operative position.Tn non order to make the idler conveying members 91 adjustable radiallyto accommodate Work of varying sizesy and to meet diderent workingrequirements, the supporting members 93 are not directly secured to thespider 94 N0 but are mounted radially slidable therein, as shown inFigs. 12 and 13. To this end there are milled in the front of the member94 a series of radially extending shallow slots,

deep enough to slidably accommodate the lllla supports 93, and upon theouter face of said member 94 there is secured an annular cover plate 96by means ot a series of screws 97. Tn the face of the member 94 there isturned an annular grooveof a lsuieient depth to ac- 1120 pinion beingformed integra-l with its shaft which is squared, as shown at 104:, topermit the application of a wrench for adjusting t0 move the supportingmembers93 radiallyy inwardly or outwardly, depending u on which way thepinion 102 is rotated. T us l provide a very convenient and simple adjustment for maintaining the abrasive member in correct relation with thework.

As in my previous application, heretofore referred to, l organizethemachine in such a manner that the work may be rotated at a high velocitywhile it is within the field of the abrading member. For this purpose Temploy an endless belt L10, previously referred to, which is trainedaround and engages the pulleys 69 as they travel with their spindlesaround the sprocket members'at the motor end ofthe machine, This belt 40is driven by the pulley 38, as has been previously described, and issupported in proper relation with pulley spindles 69 by means of apulley 106 and an idler pulley 107 which is adjustable outwardly andinwardly to regulate the tension of the belt. The pulley 106 is keyed toa shaft 108 mounted 1n a bearing 109 located in the head of the bracket110 supported from the top-of the C-casting 45, and the other end of thesaid shaft 108 carries a lsmall pulley 111 from which is driven thepulley 112 .by means of a belt 113, to accomplish a purpose which willhereinafter lbe described. lt is obvious that as the objects enter theeld of the abf rading member, the pulley 69 and the object spindles alsoenter the eld of the moving belt L10, which therefore rimparts rotarymotion to the pulleys and their spindles,and.

the objects are spun at a high speed while being polished..

Referring to Fig. 7 it will be noticed that the ends of the spindlescarrying the objects are inclosed and protected against currents of airby means of a galvanized iron casing 114 which extends the greater partof the length of the conveyer and surrounds the objects as they -passaround the idler sprockets. The rear of this casing is formed by a pairof stationary plates 115 and 116 which are secured permanently tobracket.

members 117 and 118, respectively, these members 115 and' 116beingsuitably shaped to provide track space 119 for the spindles as theytravel with the conveyer. This space 119 is closed up by a series ofshort plates 120 (see Figs. 1 and fl) which overlap each other andY arepivoted upon the hinge pins 57 of theconveyer chainy It is understoodthat the plates'-120 are suitably apertured to admit the spindles. Thus,

retreat during the time that the objects are traveling toward the idlerend of the machine they are ".completely inclosed in the casing 114. Thetop side of the casing 114 is also continued toward the driving end soas to cover and completely surround the conveyer chain, as indicated at121. j

The lacquer-applying mechanism is located at the top of the machine andadj acent to the polishing end so that as the objects emerge from thefield of the polishing belt they are ready to have the lacquer applied.However, when the spindles leave the iniuence of the driving belt 40,they are rotating at an extremely high velocity which must be checkedbefore the mounts enter the field of the lacquer-applying devices,otherwise the lacquer would be thrown on by centrifugal force. It is,nevertheless, preferable to rotate the mounts slightly during theapplication of the lacquer so as to secure an even coating. Accordingly,when the spindles leave the influence of the driving belt, Tautomatically arrest their rotation by means of a brake, and later causethem to revolve at a low speed suited to the application of the lacquer.To this end l mount upon the top l121 of the casing a bracket member122, the back end of which is forked (see Fig. 51) and projects abovethev path of travel of the spindle pulleys. The forked end of thisbracket member is apertured to receive a vertically-reciprocatoryplunger 123 which is forced downwardly in its mounting by means of acoil spring 124. The lower end of this plunger member 123 is enlargedinto the form of a foot, as shown at 125, and is shod -with af leatherpad 126, the length of the plunger being such that the rotating pulleys,as they pass beneath the 105 plunger, engage the leather and thus have'their rotation arrested. Tnorder again to cause the spindles to revolveat the lower velocity necessary when applying the lacquer,

l arrange a bracket arm 127 (see Figs. 2 and 110 4) which -is pivoted at128 to the bracket adjacent the journal bearing 109. The free end ofthis bracket member is T-shaped to form a bearing for a transverse shaftwhich carries the pulley 112 at the rear of 115 the bearing, and a smallpulley 129 at the lfront thereof. These pulleys are both keyed upon theshaft and are driven by'the belt "113 previously referred to. Thus, thepulinavnoar driving connection. rlhe inertia of the. spindles and thefact vthat they are mounted in relatively frictionless ball bearings,cause the spindles and the mounts they carry to continue to revolvewhile the lacquer is being applied and after they have passed beyoud theinfluence of the pulley .129.

Describing the lacquer-applying .mechanism, which is of the compressedair type, the lacquering head or spray nozzle designated `as a whole 130isl mounted upon .a 1111" -shaped bracket 131 (see Fig.4 3), which isadapted to slide upon and oscillate about the center of a shaft 132. lltwill be observed by referring to Fig. 3 that the position of the head issuch that the nozzle points d1- rectly toward the mount which isbeing'operated upon. llt will, however, be noticed that the mount hasbeen thrust out upon the end of the shifter pin and from od the chuckmember 82, as more clearly shown in Fig. 10. Thislongitudinal shiftingof the pin 85 is accomplished by means of a cain track lmember 133 whichis shaped to follow' the direction of travel of the spindles and isobliquely arranged to push forward the shifter pins into the positionshown in Figs. 3 and 10. 1n order to insure that the shifter pins 85 areall pushed forward precisely the sameamount, ll secure an annular wirering 133 in a groove at the proper distance from the4 rear end of theshifter pin so that it will engage the end of the hub of the pulley 69,and to prevent the jarring or vibration of the machine from impartinfalse longitudinal movements to these shi er pins, each is equipped witha small spring 1 33,b which bears against the surfaceof'the in andoperates as a brake. Retraction o the shifter pins y,in order to permitthe application of the mounts to the chuck, is accomplished by a secondcam track located at the back of the machine, which will' be hereafterdescribed. Referring to Fig. 6, it will be noticed that from the.structural 1w-shaped member 61 there extends a laterally projecting castiron bracket 134 within which are' aHiXed the shaft 132, upon which thelacquering head is actuated, and a second fixed shaft 135. Dependingfrom the lower side of the bracket 134 there is also riveted a smallbracket 136,

the lower end of which constitutes a guide or bearing for the rod 137.rllhis latter is reduced in diameter at one of its ends 138 to enter andslide freely within the end of the said bracket 136, and the other endis secured in a knuckle piece 139 which is pivotallyI connected toy anarm 140 keyed upon the end of the shaft 141, mounted to oscillate in thebracket 142. 'llhe bracket 142 is bifurcated to admit another arm or dog143, which is also keyed to the shaft 141, and this. latter arm 143 isarranged in such a position on the shaft as to be engaged successivelyby a Series 'c f inwardly projecting pins 144 fixed valve head 145,which is arranged withinthe valve chamber 146, the latter bein formedintegrally with the bracket '142. 'll is valve chamber 146 comprises ashort cylindrical casting whichl is bored out to rovide a working face147 for the inner side of the valve head 145, which oscillates therein,the outer end of the bore being closed by means of a head or cap 148.screwed therein, between which and the valve head 145 there is a space149 for the passage of air. @our pressed air under considerable pressureis admitted to the space 149 in the valve chamber through the pipe 150.The valve head 145, shown in side elevation in Fig. 17 and in endelevation in lFig. 18, is provided with a pair of perforations 151 and152 which constitute the valve openings and are adapted to register witha pair of openings 153 and 154 formed in the face of the valve chamber,as seen more clearly in Fig. 18.

The aperture 152 is, as shown, considerably .larger in area than theaperture 151 so that the former will open sooner and close later ,thanthe'valve opening 151 as the valve is` oscillated. rllhese `openings 153and 154 communicate, respectively, with flexible vpipes 155 and 156leading, to the lacquering head -or spray nozzle 130, which isillustrated in Figs. 19 to 2.2, inclusive.

r1`he principal part of the lacquering head 'or spray nozzle 130 is acasting 157 which of the member 158 is split and provided v with aclamping .screw 161 which permits the casting 157 to be adjusted andclamped in any desired position. The slide mounting 159 is also adaptedto be locked in the proper position on the bar 160 by means of a setscrew 162, which is threaded into the back of the mountin r1he supply oflacquer is carried in a tan 163 which is elevated slightly by asupporting bracket 164 mounted upon the top of the casting 161 and flowsinto the spray head 157 simply by virtue of the did'erence in levelbetween the surface of the liquid in the tank 163 and the lacqueringhead 157. The connection between the tank and the head is obtained bymeans of a flexible rubber tube- 165, between which and' the tank isinterposed, for convenience, a stop. cock 166. Referring to- Fig. v21,it will be observed thatv the casting 157 vis bored 60 valve nose 169.

vout from the lower end to provide a central chamber 167 whichcommunicates with an aperture 168 connected to the pipe 165. `1n thelower end of this chamber or bore 167 there is screwed a valve nose 169which is bored out to fit the needle valve stem 170. This inner valvenose is surrounded by an outer nozzle 171 which receives air under`pressure through a conduit 172 from the 1o aperture 173, which isconnected to the pipe 156. When the needle valve 170 is elevated to openthe needleA valve nose, the lacquer flows out into the point of theouter nozzle space where it is met by the high pressure air and thusdelivered in the form of a ver fine spray toward the part to be lacquereIt should be noted that the shape of the two nozzles 169 and 171 is suchthat the air under pressure passing out of the outer nozzleopening,'creates an eductive effect which sucks the lacquer positivelyout of the inner nozzle.

Describing the operating connections for the needle valve stem `170, itwill be observed that the upper-fend of the casting 1.57

is turned .off in theform of a cylinder v174 around and above which fitsa cylindrical thimble head 17 5.v Actually, the cylindrical portion 174constitutes a piston for the mov-A able cylinder 175 which, for apurpose ,which S10 will hereinafter appear, is provided with a smallvent hole 17 5V so as to allow considerable leakage. The lower end ofthis thimble 175 is formed with a pair of diametrically oppositedepending lugs 176 whichare faced 95 off on their inner opposedsurfacesto admit a, diametrically extending yoke piece 17 7 which is securedlto'said'lugs 176 by means of screws 178. This yokev piece 177 is locatedsome distance below the bottomY of the cylinoo drical piston portion174,which is bored out centrally to accommodate a compression spring 179interposed between the top of the yoke and a threaded plug 180 closingthe top of the bore. The needle4 valve. stem 170l e5 extendsupwardly'out of the chamber 167' and through a stuiing box 181, abovewhich it is pinned into a depending stud 182 which l is threaded intothe yoke 177thus provid ing for vertical adjustment. Inkthe top side ofthe stationary piston portion 174 there is formed an annular groove orair pocket 183 which communicates,.by a conduit 184, with an aperture185 connected tor the pipe 155 leading to the compressed air valve. Itis manifest that when compressed air is adwhich flows from out of theinner nozzle will always be subject to the full air presthe pins 144,which successively strike thel arm 143, and the valves remainin suchopen position until the rod 137 is moved by a mechanism which will nowbe described. 4

Referring to Figs. 6, 8 and 9, on the shaft 135 there is slidablymounteda slipper member 186, from the. under side of which depends an integrallug 187 to permit the attachment of a coil tension spring 188, the otherend of which is secured to a small fixed standard 189. On the inner sideof the member 18.6 therelis integrally formed a pair of laterally facingbosses 190 and 191 which pivotally support the vertically extendinglever 192 and the downwardly projecting bell crank lever 193. The lowerend of the lever 192v is adapted to engage a shoulder 194 formed on theend of the horizontal arm of lthe bell crank 193, which latter isnormally urged upwardly by means of a coil spring 195' attached to thelug 196, which is an inajournal-like neck formed between a pair' ofshoulders 199 on the lower part of the C- shaped castingv131 previouslyreferred to,

which carries the lacquering head. The lower part of this bracket 131 isextended longitudinally of the fixed shaft 132 and bored out so as to becapable of sliding freely thereon, and is normally maintained inequilibrium as against rotary motion on the said shaft 132 by means of acoil spring.

200 stretched between a pin 201' secured in the top of the lower part ofsaid bracket 131, anda pin 202 secured in the upper side of the. end ofthe member 186. Thls spring 200 tends to swing the lacquering headtoward the back of the machine, which tendency is resisted by a camroller 203 `mounted to revolve upon an inwardly facing boss 204 andadapted to engagea cam track 205 which, by means of an integral boss206, is secured to the fixed shaft 132. The track member 205 is soshaped as to impart a rotary motion to the bracket 131 around the shaft132 as an axis during the time that the head is being moved slidablyalong the said shaft. It should be understood that the bracket 13'Acarrying the lacquering head, by virtue of the shoulders 199 engagingthe part 198, partakes of whatever reciprocatory motion is navmanimparted to the part 186 in addition toits Aao dll

oscillatory movement just described.

The operation of the reciprocating mechanism for the lacquerin head willnowbe described. Referring to ig. 8, it will be noted that the pin 111is just in the act of passing by the. arm 113; the valves 151 and 152thus being opened to their fullest extent so as to render the lacqueringhead operative to apply lac uer to the mount which is being operate uon, in this case the object marked 207. Whi4 e the mechanism is in thisinstantaneous position, it will be observed that the. lever 192 ismaintained in an upright position, due to the fact that its curved face208 is engaged and forced horizontally by means of the collar 80 on thespindle carrying the mount which has just previously been coated withlacquer. lnasmuch as the lever 192 is prevented from rotating againstthe action of the spring 197 because its lower end is interlocked withthe shoulder 191 on the horizontal arm of the bell crank 193, the entireslipper member 186 moves in a horizontal direction on the shaft 135. Theslipper 186 and the lacquering head which is mounted on the member 131connected-to the slipper 186 thus move synchronously with the c onveyer,and lacquer is during this time being appliedto the object. Also as thelacquering head moves with the conveyer, the cam track 205 engages theroller 203 and oscillates the bracket 131 carrying the lacquering head,which thus describes an arc `of a circle around the object anddistributes the lacquer evenly over its entire surface. -Shortly beforethe lacquer-ing head reaches the limit of its stroke, its stroke beinslightly .less than the spacing of the spind es of the conveyer, thelower end 210 of the bell crank, which is forked so as to fit over therod 137 with substantial clearance, strikes the adjustable collar 211'which is threaded upon the rod 137. `When this occurs, the bell crankdoes not oscillate on its pivot, since the spring 195 iscomparativelystrong, but. instead of doing so it remains in the samerelative position on its mounting 186 and thus moves the rod 137longitudinally. As previously described, the rod 137 is pivotallyconnected to the upper end of the arm 110 which is fast upon the end ofthe valve stem 111, and'thus thelatter is oscillated in a direction toclose the openingsll and- 152. When the opening 151 closes, the supplyof compressed-air is cuto' from the pipe 155, Y leading by way of theaperture -185 and conduit 181, to the space V183 within the pistonmember 171. When this occurs, the air under pressure which haspreviously been entrained in these spaces rapidly leaks out,due to thevent hole in the top of the cylinder 175, and the spring 179 then forcesthe yoke 177 downwardly and closes the lacquer needle valve 170, -lhevalve aperture 152, ow-

ing to its greater area,- r'emains open for an instant after the closingof the valve aperture 151 has shut olf the lacquer feed by closing theneedle valve 170, and thus what little lacquer has drippedv out of theneedle valve shortly before it closed, is effectively eX- pelled fromthe nozzle. When the valve opening 152 finally does close, thecompressed air supply is entirely cut otl' from both of the apertures173 and185, and the lacquer head remains inoperativeto spray lacqueruntil the compressed air valve is again opened. 'Shortly after the valveaperture 152 has become entirely closed by themovement of the valve stem111 under the influence of the rod 137, the side of the arm 110 strikesagainst a lug 212 which is cast integrally with the bracket casting 112;thus, the movement of the control rod 137 is positively arrested and thebifurcated end 210 ot the depending arm 0f the bell crank 193 isprevented from moving any farther in aI longitudinal direction. Since,however, the member 186 is still engaged with the conveyer andconsequently traveling bodily with it, the pivot of the bell crank moveswith reference to its bifurcated end 210, the power of the conveyerovercoming the resistance of the spring 195, with result that the bellcrank swings in a counter-clock-wise direction and' the shoulder 191, onits horizontal end, is disengaged from the lower end of the swinginglever 192. When this occurs, the slipper member 186 flies back under theinfluence of the relatively strong spring 188, carrying 10u with it thelacquer head, during which move-l ment the vertical lever 192 wipes pastthe' part of the object spindle, the spring 197 being relatively weak ascompared with the spring 188. As soon, however, as the lever 1105 192has wiped past the member 80, it again assumes a vertical position, withits lower end in engagement with the shoulder 191 on -the bell crank andis found to be in a position ready to be engaged -by the part8() on 11uthe next succeeding spindle as soon as the slipper member 186 has beenarrested by its end 213 striking the adjustable stop member 211.Thereupon, a fraction of a second after the sliding parts have come torest in their extreme right hand position, the next spindle engages thelinger 208 and the complete cycle of operations is repeated. lt shouldbe understood that when the 'bifurcated end 210 strikes the part 211 andshifts the rod 137 120 to close the compressed air valve, the linger 113is at thatinstant located in thespace between-a pair of the fpins'111carried by the sprocket wheel 17, and thus there is no interferenee with-its reverse motion. lt 12.?l should also be observed that directlyafter the lacquering head has resumed its forward movement, due to oneof the parts 80 striking the linger 208, one of the pins .111 strikesthe arm 113, opening the compressed air valve, which thus causes thelacquering head ,to expel liquid fromthe nozzle. During the cated aseries of pipes 216 supplied with live steam from a valve 217. rI`hesepipes extend parallel with the direction of travel of the objects andare locateda short distance below them. It is manifest that the eiect ofcausing the objects to travel for a considerable distance immediatelyabove these heated pipes is to dry the lacquer quickly. When the objectspass out of the end of the steam heated zone above the series of pipes216, they are carried by the idler sprockets into the lower portion ofthe casing 114, which is relatively cool, and then travel in a reversedirection toward the polishing end of the machine. After they havetraveled to approximately the middle of the machine they pass beneath ahorizontal pipe 218 which-is perforated along its lower side and issupplied with cold compressed air through the valve 219. The jets ofcold air from the pipe 218, which strike the objects in their travel,completely cool the objects and reduce their temperature to a degreewhich admits of their being removed from the conveyer without danger ofinjury to their inished lacquered surfacsrs... i A

lIhe objects are automatically removed from the spindles of theVconveyer by mechanism shown in Figs. 2, 4 and 4a. It should beunderstood that during the time that the objects are being lacquered,heated, and cooled, the; shifter pins have been pushed forward in thehollow spindles to their fullest extent. In order to return theseshifter pins to their inoperative position ywhile at the same timeassisting in the disengagement of the objects from the spindles, Isecure to the iixed'longitudinal member 62 a pair of `small brackets 220and 221 which support a pair of obliquely `arranged strap metal members222, these being spaced apart vertically a sufieient distance to admitthe necks at the ends of the shifter pins, but closeenough to each otherto prevent the heads 223 from passing between. The cam track members 222are suitably positioned so that the heads- 223, on the back ends of thespindles, in their movement with the conveyer pass behind and engage theoblique een thrust out ofnanos? surface of the strap metal members 222which thus operate to withdraw the shifter pins into their inactiveposition so that their ends 86 are withdrawn within the chuck members82. When this occurs, obviously,

`quer or other causes, themounts remain in engagement with' the chuckmembers 82 or pins 86 and do not drop oif. Accordingly, to insure theremoval of such I employ the mechanism shown in Figs. 4 and 5. Thiscomprises a horizontally Swingin arm 224 which is mounted upon avertical xed pivot 225 and urged against the direction of travel of theconveyer by means of a rather light coil spring 226. The outer end ofthis swinging arm 224 carries a depending finger or rod 227 which isarranged to engage the end of the spindle just behind the mount 84 andwipe the latter 'from oi the end of the chuck as the conveyer carries italong. When the end of the spindle has wiped past the depending finger227, the latter swings back into its normal position, as shown in Fig.4. The finished mounts, when detached ,from the conveyer, fall into apadded spout 228 (see Flg. 1) which delivers them into a box 229.

The supply of rough unfinished mounts is conveniently placed in a trough230 supported just below the ends of the spindles in such position thatthe operator can conveniently, by hand, apply them to the chucks.

It is manifest that many of the details of the machine may be modifiedconsiderably without departing from the spirit of the invention, andhence I do not wish to be limited, except as specified in the 4appendedclaims.

I claim- 1. In a machine of the class described, the combination of anendless continuously traveling conveyer provided with a series ofobject-supports, means for rotating said objects on said supports,polishing means adapted t0 operate upon said objects during a portion oftheir travel on said conveyer, coating means adapted to apply liquid

